Pipe-casting machine



.Sept 8, 1925.

Hnnllllnml 'A mmm: 1 w llllllllll ull/ll I J. A. BYERS PIPE CASTING MACHINE Filed May 12, 1925 2 Sheets-Sheet 1 attorney Sept. 8, 1925.'

J. A. BYERS 2 Sheets-Sheet 2 mwxoi Patented Sept. 8, 1925.

UNITED STATES PATENT oFFIcE.

JOHN A. BYERS, 0F CHICAGO, ILLINOIS, ASSIGNOR T0 JAMES '.B. GLOW & SONS, 0F

` CHICAGO, ILLINOIS.

PIPE-CASTING MACHINE.

Application filed May 12, 1925.

To all whom. t may concern:

Be it known that I, JOHN A. Bruns, a citizen of the United States, residing at Chicago, in the county of Cook and State of Illinois, have invented certain new and useful Improvements in Pipe-Casting Machines, of which the following is a tspeciication.

\ The invention relates to pipe casting machines with special relation to those known as centrifugal machines, in which machines a mold is rotated at a high velocity and met-al is poured into the interior thereof and spread and compacted by centrifugal force. i

It is an object of the invention to provide a trough for such a machine that will pour the bell first and subsequently will pour at a plurality of points in the length of the pipe simultaneously.

It is a further object of the invention to provide a machine that will place the metal quickly and uniformly throughout the length of the pipe and which will be simple to operate.

Further objects of the invention will appear from the following description when read in connection with the accompanying drawing showing an illustrative embodiment of the invention, and wherein Fig. 1 is a diagrammatic side elevation;

Fig. 2 is a detail longitudinal section parallel with the tracks upon which the mold travels, as seen in Fig. 1; f

Fig. 3 is a side elevation of the trough partly broken away;

Figs. 4, 5, and 6 are detail transverse sections through the trough taken on lines 4 4, 5-5, and 6 6 respectively of Fig. 2;

Fig. 7 is a section similar to Fig. 6, showing the trough rotated to enable all of the u spouts to pour, and Fig. 8 a fragmentary plan view of the mold l reciprocating mechanism.

As shown, the device comprises a bed 10, having a frame 11 movably mounted thereon by means of wheels 12--13.

To cause the mold to reciprocate upon the bed 10 when desired, there is shown a drive crank wheel 14 mounted upon a standard 15 upon the axis 16. The crank`17 of the wheel is shown as connected by means of a link 18 with a pin 19 aiiiXedJto the exterior of the mold easing.

Serial' No. 29,753.

Mounted to revolve within the casing 20 upon bearings not shown, a mold 21 is provided, which mold may be revolved at a high rate of speed by means of an electric motor 22 acting through pinion 23 upon a ring gear 24. The motor 22 is shown as mounted upon the frame 11 and moving therewith.

To support a trough 25 there is shown a standard 26 in which a stub shaft 27 carried by the trough is revolubly mounted in journal 28. Means to supply the trough 25 with metal is shown in the form of a Crucible 29 which may be movably supported above the trough `by means not shown.

To enable the operator torotate the trough 25 about its axis, a handle 30 is shown, which handle may be limited in one direction of its movement by a stop 31 carried by the journal 28.

To deliver molten metal to the interior of the mold 21, there are shown spouts 32, 83, 34, and 35, four being shown for purposes of illustration, although a greater or less number could be utilized as is obvious.

To deliver the proportionate amount of metal to each spout, a series of grooves 36, 37, 38, 39 are shown outlined and separated from each other by means of ridges 40, 41, 42. Ridges 43, 44, and 45 are shown for the purpose of deflecting the metal to each spout, terminating the ends of the respective grooves. A

Since more metal is required in the bell than in any other portion of the pipe, it is desirable to pour metal into the bell only at first, until such time as an equal rate of pouring through all the spouts, including the end spout 35, will result in a uniform thickness of the pipe throughout. This is accomplished according to the present invention by a difference in slope of the spout 35 from the slope of the other spouts, and by the method of manipulation of the trough, rendered possible by the structure illustrated. 4The trough as a Whole, due to the inclination of the machine, is given a slope of from 5 to 10 degrees toward the bell end of the mold as shown Ain Fig. 1.

During the pouring of ther bell, the trough is given a position of rota-tion such as shown in Figs. 4, 5, and 6, where-in the. spout 35i is shown and the surface leading to the same is shown in dot-ted lines lat 46. As

there shown, the outlet of the groove 39 to the spout 35 has a downward inclination of about l degree, which in combination with the downward slope of the trough itself will cause the spout 35 to deliver metal to the bell when metal is poured into the upper end of the trough.

To prevent any substantial amount of metal gaining access to the grooves 36, 37, 38, during this initial pouring, a fence 47 is shown extending across the upper ends of the grooves. Sutlieient metal will be placed in the pouring end of the trough so that some metal will gain access to the groove 38 by reason of which, when the trough is finally rotated to cause all of the spouts to pour, it will not be necessary to wait for the metal to How the entire length of the groove 38 before the spout 34 begins to pour. To a less degree metal may be admitted to the groove 37 for the same reason.

Vhen the bell, the space for which is shown at 48, has been completed to a point substantially flush with the exterior of the straight portion of the pipe, the attendant, by means of the handle 30, will rotate the trough until the handle comes in contact with the stop 31, in which position the spouts will occupy the angle shown in Fig. 7, and metal will be poured from all of the spouts simultaneously. Simultaneously with the rotation of the trough, the crank wheel 14 will be set into operation to cause the mold to be reciproeated a. distance substantially equal to the distance between the troughs, so that the spout 32 will pour the portion of the pipe between the position shown thereof in Fig. 2 and the .end of the mold interior adjacent to the trough support.

By use of the structure provided by the invention, it is found that pipe may be poured with greater celerity than with devices heretofore used and moreover that the entire length of the pipe may be poui'ed before any portion thereof begins to chill so that the strains of solidification may be uniform throughout the length of the pipe.

lith pouring devices heretofore in use, it has been difficult or impossible to provide the thickness of wall desired in pipe of large size, by the centrifugal mode of casting, since there is a limit to the speed at which metal can be poured. By virtue of the iecipi'ocation of this mold, provided by the present invention, the wall of pipe may be made of any reasonable thickness desired.

Minor changes may be made in the physical embodiment of the invention without departing from the spirit thereof.

I claim:

1. A centrifugal casting machine comprising a trough having a plurality of spouts intermediate its length and a spout adjacent the end thereof, means to revolve said trough about its axis to cause said end spout only to pour during the rinitial pouring action and after movement of revolution to cause said intermediate 'spouts and said end spout to pour simultaneously.

2. A centrifugal casting machine comprising a mold, an inclined trough .projecting into said mold, having a series of longitudinal grooves upon its metal conducting surface, a series of spouts delivering from said respective grooves to the interior of the mold, means to move said trough about its axis to cause the end spout to pour to the exclusion of the other spouts during the initial pouring action and after movement of the trough to cause the remaining spouts to pour simultaneously with said end spout, and means to revolve said mold upon its axis.

3. A centrifugal casting machine comprising a mold, an inclined trough projecting into said mold, having a series of longitudinal grooves upon its metal conducting surface, a series of spouts delivering from said respective grooves to the interior of the mold, means to move said trough about its axis to cause the end spout to pour to the exclusion of the other spouts during the initial pouring' action and after movement of the trough to cause the remaining spouts to pour simultaneously with said end spout, means to revolve said mold upon its axis, and means to reciprocate said mold longitudinally during the simultaneous pouring of all of said spouts.

4. A centrifugal casting machine comprising a. mold, means to revolve said mold about its axis, an inclined trough projecting into said mold having an end spout and a plurality of intermediate spouts, the surface delivering to said end spout having a greater inclination than the surfaces delivering to said intermediate spouts, said trough having a series of longitudinal grooves in its bottom terminating at the respective spouts and adjacent the receiving end of said trough, a fence at the latter termination of said grooves to control'deliveiy of metal thereto, means to oscillate said trough about its axis whereby to cause metal to bedelivered to the groove leading to said end spout and to cause said end spout to pour lalone during an initial pouring and after oscillation to cause said intermediate spouts. to pour slmultaneously with said end spouts.

JOHN A. BYERS. 

